<!--
{
  "availability" : [
    "DriverKit: -"
  ],
  "documentType" : "symbol",
  "framework" : "SCSIControllerDriverKit",
  "identifier" : "/documentation/SCSIControllerDriverKit/kIOServicePowerCapabilityPause",
  "metadataVersion" : "0.1.0",
  "role" : "Macro",
  "symbol" : {
    "kind" : "Macro",
    "modules" : [
      "SCSIControllerDriverKit"
    ],
    "preciseIdentifier" : "c:@macro@kIOServicePowerCapabilityPause"
  },
  "title" : "kIOServicePowerCapabilityPause"
}
-->

# kIOServicePowerCapabilityPause

A PCIe-specific power state for halting transactions while reallocating resources.

```
#define kIOServicePowerCapabilityPause
```

## Discussion

[`IOUserSCSIParallelInterfaceController`](/documentation/SCSIControllerDriverKit/IOUserSCSIParallelInterfaceController) supports this power state, in addition to the <doc://com.apple.documentation/documentation/DriverKit/kIOServicePowerCapabilityOn> and <doc://com.apple.documentation/documentation/DriverKit/kIOServicePowerCapabilityOff> power states defined in the base <doc://com.apple.documentation/documentation/DriverKit> framework. Implement the <doc://com.apple.documentation/documentation/DriverKit/IOService/SetPowerState> method in your service object and use it to put your driver in a safe state for any of these power states.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)